Intelligent Control System for Gas Combustion

Abstract

This application relates to the technical field of gas combustion equipment, and discloses an intelligent gas combustion control system, which includes an air duct and a gas pipe. The gas pipe includes an intake pipe and a spray rail, and the air outlet of the spray rail is connected to the side wall of the air duct; an intake valve and a gas type regulating valve are provided between the intake pipe and the spray rail. The intake valve is used to supply gas from the intake pipe to the spray rail, and the gas type regulating valve is used to supply gas from the intake pipe to the spray rail according to the gas type. The gas supply amount of the gas type regulating valve is calculated by the following formula: T = αW, where T represents the gas supply amount of the gas type regulating valve, α is the gas type adjustment coefficient, and W is the gas supply amount of the intake valve. The intake valve includes a first intake valve and a second intake valve, and the diameter of the air vent of the first intake valve is larger than that of the second intake valve. This application is suitable for burning different types of gas, can improve the effect of gas premixing, and can improve the combustion efficiency of gas.

Description

Technical Field

[0001] This application relates to the technical field of gas combustion equipment, and particularly to an intelligent control system for gas combustion. Background Art

[0002] When gas burns, it needs to be mixed with a sufficient amount of oxygen to burn completely. To achieve this goal, the gas must be pre-mixed with air so that the gas and air are in full contact, enabling the gas to burn completely in a short time. However, if the gas is mixed with excessive air, the calorific value of the mixed gas will be reduced, resulting in a decrease in combustion efficiency. Therefore, the gas should be mixed with air according to the combustion reaction formula to achieve the highest combustion efficiency of the gas.

[0003] In practice, high-power gas stoves often use partial pre-mixing or full pre-mixing for combustion after mixing. Among them, full pre-mixed combustion has the advantages of a small air coefficient, a high flame temperature, complete combustion, and low CO and NOx contents in the combustion products. In practice, the control method of the high-power gas stove for the mixing of gas and air is often to control the output of the gas, and then control the operation of the fan according to the gas delivery volume to allocate an appropriate proportion of air. Some use methods such as gas valve linkage with air dampers to control the air ratio. However, these control methods are not precise. At the same time, due to the process deviation in the production process of the gas stove, each gas stove product may need to be finely adjusted. Also, because of the pressure change of the gas used by the user, on-site adjustment is required. The consistency of the gas combustion efficiency and the convenience of maintenance are not ideal. At the same time, the gas stove cannot adjust the mixing amount of gas and air according to different gas types. Summary of the Invention

[0004] The purpose of this application is to provide an intelligent control system for gas combustion, which solves the problem that the existing gas combustion control equipment cannot adapt to the mixing of different types of gas and air, and achieves the effect of fully mixing different types of gas and air to improve the combustion efficiency.

[0005] An embodiment of this application provides an intelligent control system for gas combustion, including an air duct and a gas pipe. The gas pipe includes an inlet pipe and a spray rail, and the air outlet of the spray rail is connected to the side wall of the air duct; an intake valve and a gas type regulating valve are provided between the inlet pipe and the spray rail. The intake valve is used to supply gas from the inlet pipe to the spray rail, and the gas type regulating valve is used to supply gas from the inlet pipe to the spray rail according to the gas type.

[0006] In the embodiment of the present application, by setting a gas type regulating valve, while the intake valve supplies gas from the intake pipe to the fuel rail, the gas type regulating valve is used to supply gas from the intake pipe to the fuel rail according to the gas type. When controlling the supply amount of different types of gas, it can improve the control effect of the ratio of different types of gas to air, improve the combustion effect of different types of gas, and improve the combustion control effect of different types of gas.

[0007] In a possible implementation manner, the gas supply amount of the gas type regulating valve is calculated by the following formula: T = αW, where T represents the gas supply amount of the gas type regulating valve, α is the gas type adjustment coefficient, and W is the gas supply amount of the intake valve. In this implementation manner, the gas amount entering the air duct can be controlled according to the gas supply amount of the intake valve and different types of gas, improving the control effect of the gas ratio of different types.

[0008] In a possible implementation manner, the intake valve includes a first intake valve and a second intake valve, and the vent diameter of the first intake valve is larger than that of the second intake valve. In this implementation manner, the intake valve can control the gas intake amount through the first intake valve and the second intake valve with different vent diameters, improving the control effect of the gas amount.

[0009] In a possible implementation manner, the vent diameter of the first intake valve is 3 to 10 times that of the second intake valve. In this implementation manner, by setting the vent of the first intake valve to be 3 to 10 times that of the second intake valve, the intake amount of the first intake valve and the intake amount of the second intake valve can be adjusted at different levels, and then the gas intake amount can be finely adjusted according to the second intake valve, improving the control effect of gas combustion.

[0010] In a possible implementation manner, the intake valve further includes a third intake valve, and the vent diameter of the second intake valve is larger than that of the third intake valve. In this implementation manner, by setting the third intake valve, the gas supply amount can be further controlled by the first intake valve and the second intake valve, improving the control effect of the gas mixing ratio.

[0011] In a possible implementation manner, the vent diameter of the second intake valve is 3 to 10 times that of the third intake valve. In this implementation manner, by setting the vent diameter of the second intake valve to be 3 to 10 times that of the third intake valve, the system can finely adjust and control the gas supply amount according to the third intake valve with a different control level from the first intake valve and the second intake valve, improving the control effect of the gas mixing ratio.

[0012] In a possible implementation, a gas pressure sensor is provided on the side wall of the intake pipe, and a flow sensor is provided on the side wall of the air duct. The flow sensor is arranged on the front side of the injection rail. It further includes a controller, which is electrically connected to the gas pressure sensor, the flow sensor, the intake valve, and the gas type regulating valve. In this implementation, the pressure of the gas is detected by the gas pressure sensor, and the flow rate in the air duct is detected by the flow sensor. Then, the opening and closing of the intake valve and the gas type regulating valve are controlled according to the pressure of the air and the flow rate of the gas in the air duct, so that the system can control the control amount of the gas according to the flow rate of the air and the flow rate of the gas in combination with the type of the gas, improving the control effect of the mixing ratio of the gas and the air.

[0013] In a possible implementation, a pilot flame pipe is connected to the intake pipe, and a pilot flame valve for supplying gas to the pilot flame pipe is provided on the intake pipe. The pilot flame valve is electrically connected to the controller. In this implementation, the pilot flame can be supplied with gas through the pilot flame valve and the pilot flame pipe, improving the combustion stability of the gas combustion equipment.

[0014] In a possible implementation, the flow sensor includes a positive pressure flow sensor and a negative pressure flow sensor, and the positive pressure flow sensor and the negative pressure flow sensor are electrically connected to the controller. In this implementation, the flow rate of the air in the air duct can be accurately detected through the positive pressure flow sensor and the negative pressure flow sensor, improving the control accuracy of the air supply amount.

[0015] In a possible implementation, a communication control interface and a power supply are provided on the controller. In this implementation, the communication control interface can provide a communication interface for the controller with the outside, and then the control program in the controller can be updated, and the data of the controller can also be uploaded, improving the intelligence level of the controller. The power supply can provide electric energy for the controller.

[0016] A gas combustion intelligent control system provided by an embodiment of the present application has the following beneficial effects:

[0017] By setting the gas type regulating valve, while the intake valve supplies gas from the intake pipe to the injection rail, the gas type regulating valve is used to supply gas from the intake pipe to the injection rail according to the gas type. When controlling the supply amount of different types of gas, the control effect of the mixing ratio of different types of gas and air can be improved, the combustion effect of different types of gas can be improved, and the combustion control effect of different types of gas can be improved. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the gas combustion intelligent control system in an embodiment of the present application;

[0019] Figure 2 is a schematic structural diagram of the air duct in an embodiment of the present application;

[0020] Figure 3 It is a schematic structural diagram of a gas pipe in an embodiment of the present application;

[0021] In the figure, 100 is an air duct; 110 is a flow sensor; 111 is a positive pressure flow sensor; 112 is a negative pressure flow sensor; 200 is a gas pipe; 210 is an intake pipe; 211 is a gas pressure sensor; 220 is a spray rail; 230 is a valve group; 231 is an intake valve; 232 is a gas type regulating valve; 240 is a pilot flame pipe; 241 is a pilot flame valve; 310 is a first intake valve; 320 is a second intake valve; 330 is a third intake valve; 400 is a controller; 410 is a communication control interface; 420 is a power supply. Detailed implementation manners

[0022] Please refer to the drawings, where the same component symbols represent the same components. The principle of the present application is illustrated by being implemented in a suitable usage environment. The following description is based on the specific embodiments of the present application illustrated, and it should not be regarded as limiting other specific embodiments not detailed herein.

[0023] Referring to "embodiments" herein means that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0024] When most existing stoves control the ratio of gas to air, they often control the running speed of the air blower for supplying air according to the gas delivery volume, and then control the proportion of air supply. Among them, when some stoves control the air supply volume, they often control the running of the blower according to the gas delivery volume to supply a specific proportion of air. Some of them use methods such as gas valve linkage with air dampers to control the air intake volume, and such control is not precise.

[0025] At the same time, the process deviation in the production process of stoves makes it possible that each product may need fine adjustment to achieve the best usage effect of the stove. At the same time, due to the change in the gas pressure used by users, the stove also needs to be adjusted on site, resulting in unsatisfactory product consistency and maintenance convenience.

[0026] In addition, in real life, people may use gas or natural gas as household fuel. Users in different regions often may use liquefied natural gas from different sources, resulting in differences in the gas components of people in real life. Existing gas stoves cannot control the mixing ratio of gas and air according to different gas types, resulting in poor combustion control effects for different gases.

[0027] For the above reasons, the embodiments of the present application provide an intelligent gas combustion control system. By setting a valve in the system to control the gas supplement amount according to different gases, this system can control the ratio of gas to air according to different gas types, improve the combustion effects of different types of gases, enable different types of gases to improve the combustion efficiency through this control system, and improve the intelligent control effect of gas combustion.

[0028] In some scenarios, the embodiments of the present application can be applied to the control of commercial gas stoves, which can improve the combustion control effect of gas and, moreover, can control the gas supply amount according to different types of gas, improving the control effect of the gas combustion amount. Among them, the types of gas can be natural gas, artificial gas, liquefied petroleum gas, biogas, coal gas, and other gases.

[0029] In other scenarios, the embodiments of the present application can be applied to the control of household gas stoves in different regions. It can control the gas supply amount according to the different gas component ratios in different regions where the household gas is located. These gases with different component ratios can also be called different types of gas. Furthermore, by adjusting the gas supply amount for different types of gas in different regions, it can improve the combustion control effect of household gas in different regions.

[0030] The following uses specific examples to illustrate the intelligent gas combustion control system of the embodiments of the present application.

[0031] Figure 1 Shown in the following is a schematic structural diagram of the intelligent gas combustion control system in an example of the present application. As Figure 1 shown, it includes an air duct 100 and a gas pipe 200. The air duct 100 is used to supply air to this intelligent gas combustion control system, and the gas pipe 200 is used to supply gas to this intelligent gas combustion control system.

[0032] As Figure 1 shown, the gas pipe 200 includes an inlet pipe 210 and a spray rail 220. The inlet pipe 210 is used to supply gas to the spray rail 220, and the spray rail 220 is used to spray the gas. The gas outlet of the spray rail 220 is connected to the side wall of the air duct 100. The gas sprayed through the spray rail 220 enters the air duct 100, and the air mixes with the gas in the air duct 100, enabling the gas to burn fully during the subsequent combustion process and improving the combustion effect of the gas.

[0033] As Figure 1 shown, an intake valve 231 and a gas type regulating valve 232 are provided between the intake pipe 210 and the fuel injection rail 220. The intake valve 231 is used to supply gas from the intake pipe 210 to the fuel injection rail 220, and the intake valve 231 is used to control the gas to enter the fuel injection rail 220 from the intake pipe 210. The gas type regulating valve 232 is used to supply gas from the intake pipe 210 to the fuel injection rail 220 according to the gas type, so that the gas type regulating valve 232 can control the gas supply amount of different types of gas according to different types of gas, improving the control effect of the gas supply amount of different types of gas.

[0034] For example, different types of gas can be liquefied natural gas and coal gas. When there are differences in the components of liquefied natural gas and coal gas, the gas supply amounts of liquefied natural gas and coal gas can be respectively controlled according to the gas type regulating valve 232, improving the control effect of the gas supply amounts of liquefied natural gas and coal gas.

[0035] Specifically, the gas supply amount of the gas type regulating valve 232 is calculated by formula (1):

[0036] T = αW (1)

[0037] In formula (1), T represents the gas supply amount of the gas type regulating valve 232, α is the gas type regulation coefficient, and W is the gas supply amount of the intake valve 231.

[0038] Specifically, the gas supply amount of the gas type regulating valve 232 and the gas supply amount of W which is the intake valve 231 can be represented by flow rate. When the gas pressure is constant, the relationship between the gas supply amount of the gas type regulating valve 232 and the gas supply amount of W which is the intake valve 231 can be determined by the ratio of the cross-sectional area of the vent of the gas type regulating valve 232 to the cross-sectional area of the vent of the intake valve 231 with W.

[0039] Specifically, the intake valve 231 and the gas type regulating valve 232 can be solenoid valves controlled by pulse signals. By inputting control signals with different frequencies or pulse signals with different widths, the opening time of the intake valve 231 and the gas type regulating valve 232 can be controlled, and thus the flow rate entering the fuel injection rail 220 through the intake valve 231 and the gas type regulating valve 232 can be controlled.

[0040] Among them, α is the gas type regulation coefficient, and different values are determined according to tests.

[0041] For example, the air flow rate in the air duct 100 is 0.5 to 3 m 3 / h, when the cross-sectional area ratio of the intake valve 231 to the gas type regulating valve 232 is 3, experimental studies have shown that when the gas is natural gas, the typical value of the gas type regulation coefficient α can be from 0.1 to 0.3; when the gas is coal gas, the typical value of the gas type regulation coefficient α can be from 0.2 to 0.6; when the gas is biogas, the typical value of the gas type regulation coefficient α can be from 0.5 to 0.8.

[0042] Specifically, the intake valve 231 includes a first intake valve 310 and a second intake valve 320. The vent diameter of the first intake valve 310 is larger than that of the second intake valve 320. The flow rates passing through the first intake valve 310 and the second intake valve 320 can be controlled respectively according to different diameter values by the first intake valve 310 and the second intake valve 320.

[0043] Specifically, the vent diameter of the first intake valve 310 is 3 to 10 times that of the second intake valve 320. The vent diameter of the first intake valve 310 can be 3 times, 5 times, 7 times, 9 times or 10 times that of the second intake valve 320, so as to control the gas flow rate respectively through the first intake valve 310 and the second intake valve 320 with vent diameters of different levels, and improve the control accuracy.

[0044] According to the mechanical characteristics of the fuel injection rail 220, the first intake valve 310 and the second intake valve 320 can control the opening time of the solenoid valve through the pulse frequency. The frequencies of the first intake valve 310 and the second intake valve 320 of the fuel injection rail 220 for gas injection can be selected from 30 Hz to 100 Hz for the purpose of achieving precise control. The first intake valve 310 can achieve 8 to 32 levels of flow control, and the second intake valve 320 can achieve 100 to 240 levels of flow control, so as to achieve a gas flow control effect of more than 2048 levels through the first intake valve 310 and the second intake valve 320.

[0045] Specifically, the intake valve 231 of this system further includes a third intake valve 330. The vent diameter of the second intake valve 320 is larger than that of the third intake valve 330, and the third intake valve 330 can further improve the control accuracy of the gas.

[0046] Specifically, the vent diameter of the second intake valve 320 is 3 to 10 times that of the third intake valve 330. Among them, the vent diameter of the second intake valve 320 can be 3 times, 5 times, 7 times, 9 times or 10 times that of the third intake valve 330, so as to control the gas flow rate respectively through the second intake valve 320 and the third intake valve 330 with vent diameters of different levels, and improve the control accuracy.

[0047] In some embodiments, a gas pressure sensor 211 is provided on the side wall of the intake pipe 210, and a flow sensor 110 is provided on the side wall of the air duct 100. The flow sensor 110 is disposed on the front side of the injection rail 220. The gas pressure sensor 211 can measure the supply amount of gas according to the pressure of the gas, and the flow sensor 110 can measure the flow rate in the air duct 100, achieving the control amount of air in the air duct 100. Cooperating with the gas pressure sensor 211 to detect the gas pressure improves the pressure control effect of the gas and air.

[0048] Specifically, the present application further includes a controller 400. The controller 400 is electrically connected to the gas pressure sensor 211, the flow sensor 110, the intake valve 231, and the gas type regulating valve 232. The controller 400 can control the opening time of the intake valve 231 and the gas type regulating valve 232 according to the measurement data of the gas pressure sensor 210 and the flow sensor 110, and further can control the gas amount and the air amount, realizing the centralized control of the gas and air ratio.

[0049] Specifically, the ratio of the air flow rate to the gas flow rate in the air duct 100 is close to and slightly more than 1:1, enabling the gas to burn fully in the air.

[0050] Specifically, a pilot flame pipe 240 is connected to the intake pipe 210, and a pilot flame valve 241 for supplying gas to the pilot flame pipe 240 is provided on the intake pipe 210. The pilot flame valve 241 is electrically connected to the controller 400. Supplying gas to the pilot flame pipe 240 through the intake pipe 210 can improve the ignition stability of the stove and enhance the safety during the use of the gas stove.

[0051] Specifically, the flow sensor 110 includes a positive pressure flow sensor 111 and a negative pressure flow sensor 112. The positive pressure flow sensor 111 and the negative pressure flow sensor 112 are electrically connected to the controller 400. The controller 400 can obtain the air flow detection data of the positive pressure flow sensor 111 and the negative pressure flow sensor 112, improving the control efficiency of the air flow rate.

[0052] Among them, the positive pressure flow sensor 111 and the negative pressure flow sensor 112 can specifically be a Pitot tube flowmeter, a Venturi flowmeter, or a nozzle flowmeter, etc.

[0053] Specifically, the controller 400 is provided with a communication control interface 410 and a power supply 420. Through the communication control interface 410, in the networked state, control data can be transmitted to the controller 400 through the communication control interface 410, and then the control mode of the controller 400 can be controlled through the network by the controller 400.

[0054] For example, information on different types of gas can be provided to the controller 400 through the communication control interface 410, so that the controller 400 can control the gas supply amount according to different types of gas, thereby improving the control effect on different types of gas.

[0055] For another example, typical values of the gas type adjustment coefficient α can be provided to the controller 400 through the communication control interface 410, thereby improving the control effect on the gas supply amounts of different types of gas according to the gas type.

[0056] In the process of describing the concepts of the present application, terms such as "a" and "" and similar words (especially in the appended claims) should be interpreted as covering both the singular and the plural. In addition, unless otherwise stated herein, when a numerical range is recited herein, it is merely a shorthand method for referring to each individual value falling within the relevant range, and each individual value is incorporated into this specification as if it were separately recited herein. Additionally, unless otherwise specified herein or the context clearly provides a contrary indication, the steps of all methods described herein can be performed in any suitable order. The changes to the present application are not limited to the described order of steps. Unless otherwise claimed, the use of any and all examples or exemplary language provided herein (e.g., "for example") is merely for better illustrating the concepts of the present application and does not limit the scope of the concepts of the present application. Without departing from the spirit and scope, those skilled in the art will readily understand various modifications and adaptations.

[0057] The above has introduced in detail the devices, equipment and their working principles provided by the embodiments of the present application. Specific examples are used herein to elaborate on the principles and implementation manners of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those skilled in the art, based on the idea of the present application, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. An intelligent control system for gas combustion, characterized in that It includes an air duct (100) and a gas pipe (200). The gas pipe (200) includes an intake pipe (210) and a fuel injection rail (220). The gas outlet of the fuel injection rail (220) is connected to the side wall of the air duct (100). An intake valve (231) and a gas type regulating valve (232) are provided between the intake pipe (210) and the fuel injection rail (220). The intake valve (231) is used to supply gas from the intake pipe (210) to the fuel injection rail (220), and the gas type regulating valve (232) is used to supply gas from the intake pipe (210) to the fuel injection rail (220) according to the gas type. The gas supply volume of the gas type regulating valve (232) is calculated by the following formula: T = αW Where, T represents the gas supply volume of the gas type regulating valve (232), α is the gas type regulation coefficient, and W is the gas supply volume of the intake valve (231). The intake valve (231) includes a first intake valve (310) and a second intake valve (320). The vent diameter of the first intake valve (310) is larger than that of the second intake valve (320); the vent diameter of the first intake valve (310) is 3 to 10 times that of the second intake valve (320). The intake valve (231) further includes a third intake valve (330). The vent diameter of the second intake valve (320) is larger than that of the third intake valve (330); the vent diameter of the second intake valve (320) is 3 to 10 times that of the third intake valve (330).

2. The intelligent gas combustion control system according to claim 1, characterized in that A gas pressure sensor (211) is provided on the side wall of the intake pipe (210), and a flow sensor (110) is provided on the side wall of the air duct (100). The flow sensor (110) is arranged on the front side of the fuel injection rail (220). It further includes a controller (400). The controller (400) is electrically connected to the gas pressure sensor (211), the flow sensor (110), the intake valve (231), and the gas type regulating valve (232).

3. The intelligent gas combustion control system according to claim 2, wherein, A pilot flame pipe (240) is connected to the intake pipe (210), and a pilot flame valve (241) for supplying gas to the pilot flame pipe (240) is provided on the intake pipe (210). The pilot flame valve (241) is electrically connected to the controller (400).

4. The intelligent gas combustion control system according to claim 2, characterized in that, The flow sensor (110) includes a positive pressure flow sensor (111) and a negative pressure flow sensor (112). The positive pressure flow sensor (111) and the negative pressure flow sensor (112) are electrically connected to the controller (400).

5. The intelligent gas combustion control system according to claim 2, characterized in that, The controller (400) is provided with a communication control interface (410) and a power supply (420).

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